Cortical activation during rhythmic hand movements performed under three types of control: An fMRI study

被引：21

作者：

Bernard, R. A. ^{[1
]}

Goran, D. A. ^{[1
]}

Sakai, S. T. ^{[1
]}

Carr, T. H. ^{[1
]}

McFarlane, D. ^{[1
]}

Nordell, B. ^{[2
]}

Cooper, T. G. ^{[1
]}

Potchen, E. J. ^{[1
]}

机构：

[1] Michigan State Univ, E Lansing, MI 48824 USA

[2] Karolinska Hosp & Inst, Stockholm, Sweden

来源：

COGNITIVE AFFECTIVE & BEHAVIORAL NEUROSCIENCE | 2002年 / 2卷 / 03期

关键词：

D O I：

10.3758/CABN.2.3.271

中图分类号：

B84 [心理学]; C [社会科学总论]; Q98 [人类学];

学科分类号：

03 ; 0303 ; 030303 ; 04 ; 0402 ;

摘要：

Echoplanar fMRI was used to measure changes in cortical activation during the performance of a simple hand movement task under three types of voluntary control. Each of three imaging series alternated a task with rest: passive (in which the experimenter moved the hand), voluntary against low resistance, and voluntary against higher resistance. Contralateral activation was observed in the supplementary motor area (SMA), the primary motor cortex (M1), and the somatosensory cortex (S1) in all three tasks in each subject, whereas ipsilateral activation differed in each cortical region for each task. SMA had the widest prevalence of ipsilateral activation in all three tasks. In the M1, ipsilateral activation was observed in all but 1 subject in the two voluntary tasks but in only a few subjects in the S1 in any of the tasks. Quantitative changes in signal intensity and spatial extent of activation differentiated the voluntary tasks from the passive task and were most pronounced in the S1.

引用

页码：271 / 281

页数：11

共 68 条

[1] PREPARATION FOR MOVEMENT - NEURAL REPRESENTATIONS OF INTENDED DIRECTION IN 3 MOTOR AREAS OF THE MONKEY [J].